Press for sheet metal



(No Model.) 2 Shee-Sheet 1, C. C.M0NUTT,J1-. PRESS FOR SHEET METAL.

1\0.585.923t Patented July 631897.

@Zug @Hoz-mug 1m; yNcmms PETERS co. Mofo-Ll'ru.... mmNsTo-N, o. c4

(No Model.)

C. C. MGNUTT, Jr.

2 Sheets-Sheet 2.

PEESS EOE SHEET METAL.

No. 585,923. Y

Patented July 6, 1897.

FEA/P.

INTTED STATES PATENT Ormea.

CORNELIUS O. MCNUTT, JR., OF VARREN, OHIO, ASSIGNOR TO THE YOUNGS- TOVNIRON AND STEEL ROOFING COMPANY, OF YOUNGSTOVVN, OHIO.

PRESS FOR SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 585,923, dated .Tuly 6,1897. Application filed January 11, 1897. Serial No. 618,760. (Nomodel.)

To a/ZZ whom it may concern:

Be it known that I, CORNELIUS (IMCNUTT, Jr. a citizen of the UnitedStates, residing at Warren, in the county of Trumbull and State of Ohio,have invented certain new and useful Improvements in Presses for SheetMetal; and I do hereby declare the following to bea full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to presses for sheet metal; and it consists inthe novel construction and combination of the parts herein after fullydescribed and claimed. l

Inthe drawings, Figure l is a rear view of the press, showing the rearplunger depressed and the front plunger raised. Fig. 2 is an end view ofthe press. Fig. 3 is a cross-section through the die. Fig. 4. is across-section of a sheet-metal floor-plate such as made in the press.cam which operates the rear plunger. Fig. 6 is a detail plan view of thetreadles.A Fig. 7 is a detail sidefview of one of the trip-le vers. Fig.S is a plan view ofthe same. Fig. 9 is a detail sectional view showingthe featherkey operated by the trip-lever and the parts connected withit. Fig. IO is a cross-section taken on the line a; in Fig. l.

A is the frame of the machine, comprising uprights A', a top cross-piecea, and a bottom cross-piece ce.

B is the die, which rests Von the bottom cross-piece.

B is a licor-plate such as made by the machine. This Iioor-plate has twoor more similar channels b,and the sides of the channels are corrugated.The die B has, two similar channels b', corresponding with the underside of the door-plate.

C is the front plunger, and D is the rear plunger. These plungers arearranged over the respective channels of the die. The plun gers areshaped so that they may press the floor-plate to the desired form. Theplungers slide between the uprights and are guided vertically by them.

O is a horizontal bar for operating the front plunger, and D is ahorizontal bar for operating the rear plunger. Similar toggle leversFig. 5 is a detail view of the or links c are pivoted to the bars O' andD and'to the top cross-piece o and the respective plungers in series, asshown in the drawings. These toggle-links are preferably adj ustable inlength, each link consisting of two end pieces c', coupled together by aright and left hand screw cl. The jam-nuts d are provided to prevent thescrews d from revolving 'after the lengths of the links have beenadshaft is journaled in bearings f, formed on' brackets f', which aresecured to one end of the frame. The driving-shaft F is revolvedcontinuously in the direction of the arrow in Fig. I. V

G is a shaft journaled in bearings G, carried by the frame, and g is atoothed wheel which is journaled on the shaft G and which gears intoatoothed pinion g', secured on the shaft F.`

I-I is a crank-plate which is secured on the shaft G and is providedwith a crank-pin h.

II is a connecting-rod pivotally connecting the crank-pin 7i with a pin7L at the end portion of the bar C', which operates the front plunger.

The toothed wheel g is connected to the shaft G by clutch mechanismwhich will be more fully described hereinafter.

I is a shaft journaled in bearings I', carried by the frame, and i' is atoothed wheel which is journaled on the shaft I and which gears into atoothed pinion i', secured on the shaft F.

J is a crank-plate secured on the shaft I and provided with a crank-pinj.

J is a cam provided with a groove, one portion j' of which is concentricwith the M, the notches being beveled on one side to shaft I when thecam is moved to its farthest extent away from the press.

The cam J is secured to the end portion of the bar D, which operates therear plunger. The cam J is suspended from a bracket 7c on the upper partof the frame by a rod 7c'. The crank-pin j engages with the cam-grooveand moves the said cam and bar back and forth.

The toothed wheel i' is connected to the shaft I by clutch mechanismwhich is similar to that used for connecting the toothed wheel g to theshaft G. Any approved clutch mechanism may be used, but slidablefeatherkeys are preferably used.

L is a slidable feather-key engaging with a groove in the shaft I andadapted to be slid into and out of engagement with a notch L in the hubof the wheel e'. The shaft G is provided with a similar feather-key forengaging with the wheel g, and both featherkeys have similar means foroperating them,

M is a spring secured to the hub of the wheel and bearing against ashoulder m on the key L. This spring normally holds the key inengagement with the notch L.

M/ is a trip-lever pivoted at one end to the frame and provided with awedge-shaped portion m at its other end for bearing against a shoulder non the feather-key. The shoulders m and n are the opposite sides of anotch out in the feather-key.

N and N are collars secured to the shaft by y set-screws and providedwith guide-grooves for the feather-key to slide in.

O is a treadle-shaft journaled in the lower part of the frame at thefront of the press, and O' is a similar shaft journaled in the frame atthe rear of the press. A treadle o is secured upon the shaft O, and anarm 0 is secured to the end portion of the shaft O outside the frame.

P is a trip-rod pivoted to the arm o and to the trip-lever M',pertaining to the wheel g. A spring p is provided for holding the rodand trip-lever in their raised positions.

A second treadle P is journaled on the shaft O and is provided with alug p', which projects over the treadle o. An arm q projects from thetreadle P and is pivotallyconnected with an arm q', which is secured onthe shaft O. An arm r is secured to the projecting portion of the shaftO outside the frame, and R is a trip-rod pivoted to the arm r and to thetrip-lever M, which pertains to the wheel 2'. A spring r is provid edfor raising the rod R.

The front plunger is operated by depressing the treadle o, and bothplungers are operated by depressing the treadle P.

When the trip-levers are depressed, the feather-keys are moved intoengagement with the notches in the wheel-hubs by the springs permit thefeather-keys to enter them easily. When the front plunger is presseddown on a sheet of metal, it indents it and forms the l first channelZ9. The front plunger does not form the joint-flange s, because in orderto form the angle between the two channels b b it is essential that thetwo plungers work close together, and there is no room on the rear sideof the front plunger for the projection s2 necessary to form the flanges. The rear plunger is raised and stationary while the front plunger ismaking its downstroke and being raised again. Both plungers are thendepressed simultaneously by depressing the treadle P. The rear plungerreaches the bottom of its stroke in advance of the front plunger, formsthe joint-liange s upon the beveled rear edge s of the die, and clampsthe plate while the front plunger is forming the second channel in theplate. The rear plunger prevents the distortion of the plate while thefront plunger is forming the second channel. A third channel can beformed in a similar manner to the second, if desired.

What I claim isl. In a sheet-metal press, the combination, with twoplungers arranged side by side, of a crank and intermediate connectionsfor operating one plunger, a cam and intermediate connections foroperating the other plunger said cam having a portion of its grooveconcentric with its axis, driving devices, and separate clutchmechanisms operatively connecting the said crank and cam with the saiddriving devices and permitting them to be actuated simultaneously orseparately, substantially as set forth.

2. In a sheet-metal press, the combination, with a frame, a plungerslidable therein, a horizontal bar, and toggle links or levers pivotallyconnecting the said bar with the said plunger and frame; of a camsecured to one end of the said bar, a link pivotally supporting the saidcam from the upper part of the f said frame, and a crank-plate providedwith a crank-pin for operating the said cam, substantially as set forth.

3. In a sheet-metal press, the combination, with two plungers arrangedside by side, and separate driving mechanisms for operating the saidplungers; of a single driving-shaft, toothed Wheels for connecting eachsaid driving mechanism with the said driving-shaft, clutch mechanismsfor connecting the respective driving mechanisms with the respectivetoothed wheels pertaining to them, and lever mechanism operating to movethe said clutch mechanisms separately or simultaneously, substantiallyas set forth.

4. In a sheet-metal press, the combination, with two plungers arrangedside by side, and driving devices provided with separate clutchmechanisms whereby the plungers may be operated simultaneously or one ata time; of two treadle-shafts, connections arranged between the saidshafts and clutch mechanisms respectively, a treadle secured on one ofthe said shafts, a second treadle journaled on the same shaft andprovided with a projecting arm and a lug overlapping the other said IOOro der each plunger, and having an` angle hetWeen the said channels, anda beveled portion on its rear edge for forming a joint-ange When therear plunger is depressed, substantally as set forth.

In testimony whereof I ax my signature 15 in presence of two Witnesses.

CORNELIUS C. MCNUTT, J R. Witnesses:

JOHN O. PEW, J. MASON EVANS.

